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US 8,188,016 B2Granted
Lubricant composition and bearing using same
AssigneeNtn Corporation
InventorsMika Kohara, Takayuki Kawamura, Kenji Tamada
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AssigneeNtn Corporation
InventorsMika Kohara, Takayuki Kawamura, Kenji Tamada
Estimating the term…
A lubricant composition capable of preventing a rolling surface of a bearing from flaking owing to hydrogen embrittlement. The bearing is lubricated with the lubricant composition which is a lubricating oil or grease. The lubricant composition contains a molybdate and an organic acid salt. At least one molybdate is selected from sodium molybdate, potassium molybdate, and lithium molybdate. The organic acid salt is a sodium salt of an organic acid having one to 20 carbon atoms. The lubricant composition forms a film containing a molybdenum compound in addition to an iron oxide film on a worn surface of the bearing or on a fresh surface of an iron-based metal generated by wear. The bearing is used as a rolling bearing for use in electric parts and auxiliary machines of a vehicle. The bearing is also used as a bearing, for a motor, in which the lubricant composition is sealed.
A lubricant composition for a bearing, wherein said lubricant composition is a lubricating oil consisting of a water-based lubricating oil and a permanganate or consisting of a mineral oil, water and a permanganate.
A lubricant composition for a bearing that is a lubricating oil consisting of a metal salt of molybdic acid, a base oil which is a water-glycol hydraulic oil or a mineral oil with water, and optionally an organic acid salt,
A lubricant composition for a bearing, capable of restraining flaking owing to hydrogen embrittlement, that is a lubricating oil consisting of a metal salt of molybdic acid, a base oil which is a water-glycol hydraulic oil or a mineral oil with water, and optionally an organic acid salt,
Dependencies are inferred from the claim text.